Suggestions for preparation of IITJAM in short period of time? Which all major parts of my subject should I prepare to get good rank? Solved question papers for the same?

i'm giving iitjam this year.bt i hv very short time for preparing well for it.so can u plz give me some suggestion. my subject is chemistry,can i get solved previous question papers of jam? or in short which major part of my subject sholud i prepare 2 get good rank in examz.